CN217469459U - Power distribution network layered structure - Google Patents
Power distribution network layered structure Download PDFInfo
- Publication number
- CN217469459U CN217469459U CN202220675360.1U CN202220675360U CN217469459U CN 217469459 U CN217469459 U CN 217469459U CN 202220675360 U CN202220675360 U CN 202220675360U CN 217469459 U CN217469459 U CN 217469459U
- Authority
- CN
- China
- Prior art keywords
- level
- power
- power supply
- station
- layered structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a power distribution network layered structure, which is divided into a 1 st level, a 2 nd level, a 3 rd level and a 4 th level from a high level to a low level in sequence; the step-down transformer substation is positioned at the level 1 and is a 110kV or 35kV step-down 10kV transformer substation; the medium-voltage backbone network is positioned at the level 2 and consists of a plurality of 10kV switching stations; the medium-voltage backbone network is positioned at the 3 rd level and consists of a plurality of 10kV ring websites; located at level 4 is a customer power point. The utility model discloses a distribution network layered structure, the 10kV switching station of level 2 have trouble isolation function and generating line spare power automatic switching function, have given level 2 at the minute level power supply recovery ability of the n-1 trouble condition, take place the network fault below level 2, can not stretch to more than level 2, are showing the power supply interruption frequency who has reduced the user, have greatly reduced the number of users that are influenced under large-scale calamity or the trouble condition.
Description
Technical Field
The utility model relates to a distribution network layered structure.
Background
At present, a double-loop power supply mode is generally adopted for urban power users, power supply paths of the urban power users not only originate from different superior nodes, but also trace back upwards to present a diversified risk dispersion characteristic, and the number of influenced power failure users is large under the condition of large-scale disasters or faults. The 10kV switching station generally does not have a fault isolation function, network faults below the 10kV switching station can spread to be above the 10kV switching station, and the power supply interruption frequency of users is high; and 10kV switchyard does not possess the generating line function of autotomying generally, and 10kV switchyard can't provide minute level power supply recovery ability in the n-1 trouble condition, and if adopt standard Distribution Automation (DA) technique then the implementation cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's defect, a distribution network layered structure is provided, the 10kV switch station of level 2 has trouble isolation function and generating line spare power automatic switching function, the minute level power supply recovery ability of level 2 at the n-1 trouble condition has been given, the network fault of taking place below the level 2 can not stretch to more than the level 2, show the power supply interruption frequency that has reduced the user, the number of users that is influenced power failure under the large-scale calamity or the trouble condition has greatly been reduced.
The technical scheme for realizing the purpose is as follows: a power distribution network layered structure is divided into a 1 st layer, a 2 nd layer, a 3 rd layer and a 4 th layer from a high layer to a low layer in sequence; the step-down transformer substation is positioned at the level 1 and is a 110kV or 35kV step-down 10kV transformer substation; the medium-voltage backbone network is positioned at the level 2 and consists of a plurality of 10kV switchgears; the medium-voltage backbone network is positioned at the 3 rd level and consists of a plurality of 10kV ring websites; at level 4 is a user power point;
for a user power supply point with the power supply capacity not exceeding 800kVA, electric energy flows from a high level to a low level in sequence, and is divided into four levels from top to bottom according to the power supply trend direction, wherein the four levels comprise a 1 st level, a 2 nd level, a 3 rd level and a 4 th level in sequence;
for a user power supply point with the power supply capacity larger than 800kVA, the power is directly supplied by the 2 nd level across the 3 rd level, and the power is divided into three levels from top to bottom according to the power supply current direction, wherein the three levels sequentially comprise the 1 st level, the 2 nd level and the 4 th level.
In the above power distribution network layered structure, the core node of the 2 nd level is a 10kV switching station, which is a medium voltage power distribution station with an electric energy redistribution function; the 10kV switching station is provided with a circuit breaker, a single bus sectional structure is adopted, and each section of bus is provided with 1 incoming line and 3-6 outgoing lines; the section switch between every two adjacent sections of buses has the functions of low-voltage detection and spare power automatic switching; and under the condition of losing 1 line of incoming line, the 10kV switching station recovers the power supply of the station within 1-2 min.
In the above power distribution network hierarchical structure, the core node of the 3 rd level is a 10kV ring network station, which is a medium voltage power distribution station for distributing power; the 10kV ring network station is provided with a load switch and 2 distribution transformers not exceeding 800 kVA.
The utility model discloses a distribution network layered structure has following advantage:
(1) the network node of the 2 nd level is a 10kV switching station provided with a circuit breaker and has a fault isolation function; therefore, network faults occurring below the 2 nd level can not spread to the 2 nd level or above, and the power supply interruption frequency of users is obviously reduced;
(2) due to the bus spare power automatic switching function of the 10kV switching station, the minute-level power supply recovery capability of the 2 nd level under the condition of n-1 fault is given; compared with the standard Distribution Automation (DA) technology, the semi-automation does not depend on the laying popularization of communication optical cables, and the implementation cost is low;
(3) urban power users generally adopt a double-loop power supply mode, and power supply paths of the urban power users not only come from different superior nodes, but also trace back upwards to present diversified risk dispersion characteristics; the utility model discloses a distribution network layered structure's path pluralism has greatly reduced and has influenced the power failure user number under large-scale calamity or the fault circumstance, demonstrates the toughness characteristic.
Drawings
Fig. 1 is a schematic view of a power flow direction of a power distribution network layered structure of the present invention (a topological view of a power flow direction at a user view angle with a power supply capacity not exceeding 800 kVA);
fig. 2 is a power flow directional diagram of the layered structure of the power distribution network of the present invention (users with power supply capacity greater than 800 kVA);
FIG. 3 is a single line schematic of a level 2 10kV switchyard;
fig. 4 is a single line schematic diagram of a level 3 10kV ring website.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is provided with reference to the accompanying drawings:
referring to fig. 1, 2, 3 and 4, a layered structure of a power distribution network according to a preferred embodiment of the present invention can be divided into three or four levels from top to bottom according to the trend direction.
Referring to fig. 1, a topological diagram of a flow direction of a power flow under a user view angle with a power supply capacity not exceeding 800kVA is shown, and a power distribution network hierarchical structure is sequentially divided into a 1 st level, a 2 nd level, a 3 rd level and a 4 th level from a high level to a low level; the 1 st level is a step-down transformer substation O which is a 110kV or 35kV step-down 10kV transformer substation; the medium-voltage backbone network is positioned at the level 2 and consists of a plurality of 10kV switching stations K; the medium-voltage backbone network is positioned at the 3 rd level and consists of a plurality of 10kV ring network stations P (or ring network units); at level 4 is a customer power point L; for a user power supply point with the power supply capacity not exceeding 800kVA, electric energy flows from a high level to a low level in sequence and is divided into four levels from top to bottom according to the power supply flow direction.
Referring to fig. 2, a topological diagram of a power flow direction from a user perspective with a power supply capacity greater than 800kVA is shown, and a power distribution network layered structure is provided, wherein for a user power supply point with a power supply capacity greater than 800kVA, power is directly supplied from a 2 nd level across a 3 rd level, and the power is divided into three levels from top to bottom according to a power supply power flow direction, wherein the three levels sequentially include a 1 st level, a 2 nd level and a 4 th level. The 1 st level is a step-down transformer substation 0 which is a 110kV or 35kV step-down 10kV transformer substation; the medium-voltage backbone network is positioned at the level 2 and consists of a plurality of 10kV switchgears K; at level 4 is a customer power point L.
Referring to fig. 3, a core node of the 2 nd level is a 10kV substation, which is a medium voltage distribution substation with an electric energy redistribution function; the 10kV switching station K is provided with a breaker K1, a single-bus sectional structure is adopted, and each section of bus K2 is provided with 1 incoming line 21 and 3-6 outgoing lines 22; the section switch K3 between every two adjacent sections of buses has the functions of low-voltage detection and spare power automatic switching; and under the condition of losing 1 line of incoming line, the 10kV switching station recovers the power supply of the station within 1-2 min.
Referring to fig. 4, a core node of the 3 rd level is a 10kV ring network station P, which is a medium voltage distribution station for distributing power; the 10kV ring network station P is provided with a load switch P1 and 2 distribution transformers P2 which do not exceed 800 kVA. The topology of the 10kV ring network station P is similar to that of the 10kV switching station K, but load switches are configured instead of circuit breakers.
When the layered structure of the power distribution network is used, the 2 nd level network node is a 10kV switching station provided with a circuit breaker and has a fault isolation function; therefore, network faults occurring below the 2 nd level can not spread to the 2 nd level or above, and the power supply interruption frequency of a user is obviously reduced; due to the bus spare power automatic switching function of the 10kV switching station, the minute-level power supply recovery capability of the 2 nd level under the condition of n-1 fault is given; compared with the standard Distribution Automation (DA) technology, the semi-automation does not depend on the laying popularization of communication optical cables, and the implementation cost is low; city power consumer generally adopts the two return circuits power supply mode, and its power supply route not only derives from different higher level nodes, upwards traces back the risk dispersion characteristic that also presents the pluralism moreover again, the utility model discloses a distribution network layered structure's route pluralism has greatly reduced the number of users that receive the influence under large-scale calamity or the trouble condition and has powered off, demonstrates toughness characteristic.
To sum up, the utility model discloses a distribution network layered structure, the 10kV switching station of level 2 have trouble isolation function and generating line spare power automatic switching function, have given level 2 at the minute level power supply recovery ability of the n-1 trouble condition, take place the network fault below level 2, can not stretch to more than level 2, are showing the power supply interruption frequency who has reduced the user, have greatly reduced the number of users that have a power failure that is influenced under large-scale calamity or the trouble condition.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (3)
1. A power distribution network layered structure is characterized in that the power distribution network layered structure is divided into a 1 st layer, a 2 nd layer, a 3 rd layer and a 4 th layer from a high layer to a low layer in sequence; the step-down transformer substation is positioned at the level 1 and is a 110kV or 35kV step-down 10kV transformer substation; the medium-voltage backbone network is positioned at the level 2 and consists of a plurality of 10kV switchgears; the medium-voltage backbone network is positioned at the 3 rd level and consists of a plurality of 10kV ring websites; at level 4 is a user power point;
for a user power supply point with the power supply capacity not exceeding 800kVA, electric energy flows from a high level to a low level in sequence, and is divided into four levels from top to bottom according to the power supply trend direction, wherein the four levels comprise a 1 st level, a 2 nd level, a 3 rd level and a 4 th level in sequence;
for a user power supply point with the power supply capacity larger than 800kVA, the power is directly supplied by the 2 nd level across the 3 rd level, and the power is divided into three levels from top to bottom according to the power supply flow direction, wherein the three levels sequentially comprise the 1 st level, the 2 nd level and the 4 th level.
2. The layered structure of the power distribution network of claim 1, wherein the core node of the level 2 is a 10kV switching station, which is a medium voltage distribution station with power redistribution function; the 10kV switching station is provided with a circuit breaker, a single bus sectional structure is adopted, and each section of bus is provided with 1 incoming line and 3-6 outgoing lines; the section switch between every two adjacent sections of buses has the functions of low-voltage detection and spare power automatic switching; and under the condition of losing 1 line of incoming line, the 10kV switching station recovers the power supply of the station within 1-2 min.
3. The layered structure of the power distribution network according to claim 1, wherein the core node of the 3 rd level is a 10kV ring network station, which is a medium voltage distribution station for distributing power; the 10kV ring network station is provided with a load switch and 2 distribution transformers with the voltage not exceeding 800 kVA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220675360.1U CN217469459U (en) | 2022-03-26 | 2022-03-26 | Power distribution network layered structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220675360.1U CN217469459U (en) | 2022-03-26 | 2022-03-26 | Power distribution network layered structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217469459U true CN217469459U (en) | 2022-09-20 |
Family
ID=83267629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220675360.1U Active CN217469459U (en) | 2022-03-26 | 2022-03-26 | Power distribution network layered structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217469459U (en) |
-
2022
- 2022-03-26 CN CN202220675360.1U patent/CN217469459U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102368612B (en) | Triple-double wiring way of medium-voltage electric distribution network | |
| CN103855713A (en) | Power distribution net rack wiring structure | |
| CN111049270A (en) | Intelligent outdoor switch box and closed-loop I-shaped power distribution network thereof | |
| CN103840439A (en) | Power distribution automation protecting method achieved by matching of master station and distributed terminals | |
| CN110932258A (en) | Diamond type distribution network | |
| CN110120664B (en) | Intelligent and reliable urban power distribution network grid structure | |
| CN103872682A (en) | Switching station feeder line automatic protection method | |
| CN105305431A (en) | Snowflake grid type grid construction method suitable for urban medium voltage distribution networks | |
| CN103887777A (en) | Automatic feeder protecting method for overhead line four-section three-contact structure | |
| CN217469459U (en) | Power distribution network layered structure | |
| CN112838586A (en) | Diamond power supply topological structure of diamond power distribution network | |
| CN105576811A (en) | Power distribution network adopting four-loop-one-group crossed connection wiring | |
| CN113904326B (en) | Urban distribution network wiring mode | |
| CN202405780U (en) | medium voltage distribution network | |
| CN203813436U (en) | Power distribution network rack wiring structure | |
| CN114678873A (en) | Power distribution network layered structure | |
| CN216959346U (en) | Alternating current-direct current microgrid router system for comprehensive energy station | |
| CN203813438U (en) | Power distribution net rack wiring structure | |
| CN108521121B (en) | Method for selecting connection mode of town distribution line | |
| CN112510706A (en) | A close ring circuit with mother for 10kV distribution network | |
| CN110620378A (en) | Three-terminal star-shaped interconnected direct-current power distribution network topology system | |
| CN211530751U (en) | Diamond type distribution network | |
| CN216904302U (en) | Inner bridge power supply system applied to rail transit | |
| CN218386235U (en) | Multiport high-voltage direct-current breaker valve tower | |
| CN215956045U (en) | Double-ring network loop closing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |